Collections.Iterable Update to support Python 3.10

[fengints]

Referring to this issue
#1164

Iterable class exists in collections.abc since Python 3.3.
https://docs.python.org/3.3/library/collections.abc.html#collections.abc.Iterable

Replaced all collections.Iterable with collections.abs.Iterable in project except this one, someone made it this way

singa/examples/model_selection/Trails/singa_pkg_code/model.py

Lines 32 to 35 in 6d9cd7f

	try:
	from collections.abc import Iterable
	except ImportError:
	from collections import Iterable